Defensive publication



TX (107 .9 i t DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICEPublished at the request of the applicant or owner in accordance withthe Notice of Apr. 11, 1968, 849 0.6. 1221. Identification is by serialnumber of the application and the heading indicates the number of pagesof specification, including claims, and of sheets of drawing containedin the application as originally filed. The file 01 this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

Applications published under the Defensive Publication Program have notbeen examined as to the merits of alleged invention. The Patent Officemakes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED OCTOBER 28, 1969 867 O.Gr. 1094:

THERMOGRAPHIC REPR ODUCTION PROCESS IN WHICH A COLORED DYE IMAGE ISFORMED Frank G. Webster and Donald W. Heseltine, both of Kodak Park,Rochester, N.Y. 14650 Filed Oct. 30, 1968. Published Oct. 28, 1969 Int.Cl. G03c 5/16 US. Cl. 250-65 No Drawing. 14 Pages Specification Aprocess for thermographic reproduction is described in which a coloreddye image is formed by exposing to heat a thermosensitive elementcontaining a thermosensitive composition which comprises as a firstcomponent a heterocyclic nitrogen compound and as a second componenteither a ketomethylene compound or a reactive cyclic ammonium quaternarysalt. The first component can be a pyrimidinium salt such aspyrimidinium acetate, pyrimidinium p toluenesulfonate,l-methyl-pyrimidinium acetate, 2-amin0-l-methyl-pyrimidiniump-toluenesulfomate, and the like. The ketomethylene compound can be abarbituric acid such as 1,3-diethylbarbituric acid,1,3-diphenyl-Z-thiobarbituric acid, a 2-pyrazolin-5-one such as 3methyl-l-phenyl-Z-pyrazolin-S-one, a 3-cyano-2(5H)- furanone such as3-cyano-4-pheny1-2(5H)-furanone, and the like. The cyclic ammoniumquaternary salt can be a benzothiazolium salt such as2,3-dimethylbenzothiazolium p-toluenesulfonate,3-butyl-2-ethyl-benzothiazolium tetrafluoroborate, and the like.

